Maths Extension 2 Predictions/Thoughts (1 Viewer)

[kms1234]

The allocation could be something like:
1 mark for the initial decomposition step
2 mark to find variables A and B
1 mark to get the right answer

This is only a prediction as I believe they mark based on how the state answered these questions

 

[tywebb]

MindYourDecisions made a youtube of 16c solution

 

[Margiowas189]

thoughts on the ext 1 exam?

 

[tywebb]

Here is a pdf of mindyourdecisions youtube so can see it in 9 seconds instead of 9 minutes

 

[Margiowas189]

any predictions for the lowest E4 mark?

 

[synthesisFR]

any predictions for the lowest E4 mark?

idk but some people r saying mod-high 60s

 

[Margiowas189]

idk but some people r saying mod-high 60s

would be nice

 

[Allan Mekisic]

any predictions for the lowest E4 mark?

E4 cut off 46/70 or 65.7%

 

[tywebb]

Here are alternative solutions to 15aii and 15aiii using beta and gamma functions

 

[Allan Mekisic]

epicmaths solutions is at https://community.boredofstudies.or...ing-it-for-the-first-time.405811/post-7513591

It's a pdf made from last night's live youtube. The youtube goes for 3 hours 18 minutes and 14 seconds.

Here is the youtube:

epicmaths solutions is at https://community.boredofstudies.or...ing-it-for-the-first-time.405811/post-7513591

It's a pdf made from last night's live youtube. The youtube goes for 3 hours 18 minutes and 14 seconds.

Here is the youtube:

 

[Allan Mekisic]

epicmaths solutions is at https://community.boredofstudies.or...ing-it-for-the-first-time.405811/post-7513591

It's a pdf made from last night's live youtube. The youtube goes for 3 hours 18 minutes and 14 seconds.

Here is the youtube:

 

[tywebb]

Here are alternative solutions to 15aii and 15aiii using beta and gamma functions
View attachment 40887
View attachment 40888
View attachment 40889

One might wonder why on earth would one want to do 15aiii like that.

Well it actually removes integration entirely as well as algebraic gymnastics required to relate it back to J_n from 15ai.

It turns it purely into a manipulation of factorials.

And as Kennedy didn't say, we don't do it because it's hard, we do it because it's easy

 

[Allan Mekisic]

Very insightful watching the maths teacher do the extension 2 exam on the u tube video. I thought he did extremely well overall. Great to see a maths teacher struggle with the vector representation of the horizontal and vertical components of projectile motion. I used dx dot dt and dy dot dt which simplifies matters. I also used the double angle formula for that reduction formula but assumed the question was correct so I crossed it out. Has anyone else noted the similarity between our q15 (a) and the reduction integral in q16 (a) of 2020. If they had of got the 2 theta correct, it’s basically the same question from a different perspective. In from this year is same as jn from 2020. The second In this year should have been similar to In of 2020 except they forgot 2 theta.

 

[nsw..wollongong]

Very insightful watching the maths teacher do the extension 2 exam on the u tube video. I thought he did extremely well overall. Great to see a maths teacher struggle with the vector representation of the horizontal and vertical components of projectile motion. I used dx dot dt and dy dot dt which simplifies matters. I also used the double angle formula for that reduction formula but assumed the question was correct so I crossed it out. Has anyone else noted the similarity between our q15 (a) and the reduction integral in q16 (a) of 2020. If they had of got the 2 theta correct, it’s basically the same question from a different perspective. In from this year is same as jn from 2020. The second In this year should have been similar to In of 2020 except they forgot 2 theta.

oh my god i think i know you! doctor?

 

[tywebb]

itute solutions: https://www.itute.com/wp-content/uploads/2023-NSW-ESA-Mathematics-Extension-2-Solutions.pdf

 

[tywebb]

Here are my solutions which are typed too: https://4unitmaths.com/hsc2023e2-tywebb.pdf

 

[synthesisFR]

@carrotsss the people on conquer hsc are predicting 60 raw for e4 cuttof idk what to believe

 

[carrotsss]

@carrotsss the people on conquer hsc are predicting 60 raw for e4 cuttof idk what to believe

honestly idek either like for me I found it a bit harder than last year but then there’s all these people saying like “way easier, on the level of 2021” (which is such bs) so I just sorta assume the reality is somewhere in between

 

[scaryshark09]

honestly idek either like for me I found it a bit harder than last year but then there’s all these people saying like “way easier, on the level of 2021” (which is such bs) so I just sorta assume the reality is somewhere in between

Honestly i think it was easier than 2020. perhaps 86 e4 cutoff?

 

[synthesisFR]

Honestly i think it was easier than 2020. perhaps 86 e4 cutoff?

ur def getting an e4 then!